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Infineon Technologies BTS426L1 — Power Management (PMIC / Gate Driver)

BTS426L1 PROFET high-side switch, 50 mOhm, 5.8 A, obsolete

MPNBTS426L1
Obsolete

Infineon PROFET® BTS426L1, high-side power switch, 1 output, N-channel, 50 mOhm typ Rds(on), 5.8 A max, 5V to 34V load, TO-220-5 formed leads, -40°C to 150°C.

$3.8700Ref. price · indicative, final on quote
Infineon Technologies BTS426L1 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

BTS426L1 specifications
ParameterValue
SeriesPROFET®
Input typeNon-Inverting
Output typeN-Channel
TypeGeneral Purpose
MountingThrough Hole
Voltage - load5V ~ 34V
Voltage - supply (Vcc (Vdd))Not Required
Output current5.8A
I/O channels1
InterfaceOn/Off
Operating temperature-40°C ~ 150°C (TJ)
PackageTube
FeaturesAuto Restart, Status Flag
Rds on50mOhm
CaseTO-220-5 Formed Leads
Fault protectionCurrent Limiting (Fixed), Open Load Detect, Over Temperature, Over Voltage
Output configurationHigh Side
Ratio - Input:Output1:1

Product details

High-side switch with 50 mOhm on-resistance

The BTS426L1 is a single-channel high-side power switch from Infineon's PROFET® family, built with an N-channel MOSFET output and a typical on-resistance of 50 mOhm. It switches loads from 5 V to 34 V, delivering up to 5.8 A continuous, and requires no external Vcc supply — the gate drive is self-biased from the load voltage.

Fault protection and diagnostic feedback

A status flag output signals fault conditions to the host controller. The auto-restart feature re-enables the switch after a thermal fault once the junction cools, which is useful for intermittent overloads in lamp or motor loads.

Through-hole package for high-current routing

Housed in a TO-220-5 package with formed leads (P-TO220-5-3), the BTS426L1 is a through-hole device suited for point-of-load switching where board-level heat sinking is needed. The large tab provides a low thermal resistance path to the PCB or an external heatsink — critical when running near the 5.8 A maximum at elevated ambient temperatures.

Infineon has classified the BTS426L1 as obsolete.

Frequently asked questions

What is the replacement for BTS426L1?

No official replacement or successor part number is recorded for the BTS426L1. A functionally similar PROFET® high-side switch with comparable Rds(on) and current rating should be evaluated for new designs — confirm pin-compatibility and protection feature set with the Infineon product selector.